Packaging device



EMA

July 12, 1960 2,944,716

L. s. HOOGSTOEL PACKAGING DEVICE Filed Sept. 1?. 1958 INVENTOR LEON EHOOGSTOEL A ITORNEY with pressure-sensitive adhesive.

PACKAGING DEVICE I Leon Eugene Hoogstoel, Schenectady, N.-Y., assignorto Norton Company, Troy, N.Y., a corporation of Massachusetts FiledSept. 1'1, 195s, Ser. No. 761,512

6 Claims; c1; 229-44 The present invention relates in general to apackaging device and more particularlyto an improvement over thepackaging device disclosed and claimed in my U.S. Patent The packagingdevice of :Us. 2,744,624 comprises a:

backing member having a plurality of spaced, raised,'compressible andresilient areas and apressure-sensitive adhesive covering the upperportion only of such raised areas. Articles placed on the raised areasare. held in position by many contacts of limited'area withthe,pressure-sensitive adhesive. The form of this device most commonlyused commercially'has been single face corrugated board having the tipsof the-com1gations coated The above described packaglng device, whilegenerally accepted in commercial usage, sometimes is unsatisfactory dueto the relatively weak internal strength of the paper used informing thecorrugations of commercially available corrugated board. This permitsdelaniination to take place when an article is removed from theadhesive-coated corrugations or projections and the resultantfpick-ofior adherence of small bits'ofthe adhesive coated paper to such article.This tendency is limited and generally is'not objectionable. However,where items such as polished steel ball bearings or the like are sopacked, any delamination requires that the articles subsequently becleaned and hence is objectionable. It is economically unsound, in mostcases,'to make the corrugatedmaterial from paper having high internalstrength.

Accordinglyyan object of the present invention is to provide a methodfor eliminating the pick-off of small bits of the adhesive-coated paperor the like forming the raised areas of the packaging device of -U.S.Patent No.

2,744,624, and the adherence of such material to articles removed fromsuch packaging device.

A further object is to produce a modified version of the packagingdevice described in my said earlier patent which will not transfer bitsof the material forming the raised areas to articles packaged thereon.

Additional objects, if not .specifically set forth herein,

will be readily apparent to one skilled in'theart from the followingdetailed description of the'invention:

In the drawings: Figure 1 is a schematic illustration of the-basicelements of the packaging means of the present invention;

Figure 2 is a perspective view of the preferred, type of packaging meansof the invention.

Generally, the present invention contemplates the addition to thepackaging device of US. 2,744,624 of an in;

sert strip of material having a higher degree of internal; adhesion thanthe material used to form the spaced raised' areas, said stripcontacting at least one of said raised areas and being held thereto bythe-pressure-sensitive adhesive coating on such raised area. A coatingof pressuresensitive adhesive is provided on at least the face of saidstrip opposite that in contact with said raised area to provide meansfor adheringarticles to the packaging device.

higher degree: of internal adhesion than the material used Theinternaladhesion or strength form the insertstrip is greater than the adhesionbetween the pressure-sensitive adhesive and the article to be pack agedin contact therewith.

' Referring now to Figure 1 of the drawings, the essential elements ofthe present invention are illustrated schematically. Reference numeral10 represents the raised resilient areas, e. g. corrugations. The tiponly of each raised area is covered with pressure-sensitive adhesive 11,and overlying the tips is a strip 12 of a material having a to formcorrugations 10. Strip .12 it held firmly to the tips of the raisedareas or corrugations by the pressuresensitive adhesive 11. .Shperposedon strip 12 is a layer of pressure-sensitive adhesive 13.

The preferred form of the invention is illustrated in Figure 2 of thedrawings. Here, in perspective, is shown the base member 20 having aplurality of spaced raised areas 21 thereon, here illustrated ascorrugations. A coating of pressure-sensitive adhesive .22 is disposedbetween the tips of the corrugations 21 and an insert strip 23. A secondcoating of pressure-sensitive adhesive 22 covers the surface. of strip23. In this preferred modification, the strip 23 runs at right angles tothe length direction of corruga-.

tions 21, and a plurality of such strips 23 are provided in spacedrelationship across the face of the packaging member.'.

- The pressure-sensitive" adhesive contacting the spaced raisedcorrugations may be applied as described in U.'S. 2,744,624, or thestrip 23 may be coated on both sides before application to thecorrugations. In this latter case,

a-double-faced pressure-sensitive adhesive tape such as is described inUS. Patent 'No. 2,206,899 may be used.

'The strip 23 .should have an internal adhesion higher than that of thekraft paper or other'material used to form the. spaced raised areas,e.g. corrugations, and such internal adhesion should be greater than theadhesion power of the pressure-sensitive adhesive used on the surface ofV such insert strip. This may be accomplished by using paper which hasbeen impregnated with a strength imiparting agent such asbutadiene/acrylonitrile, brokendown rubber or the like, as is describedin US. Patents Nos. 2,726,967 and 2,410,078. Alternatively, a film orplastic strip such as regenerated-cellulose acetate, polyvinyl chlorideor the like may be used. Another suitable variation is the use as aninsert strip of a pressure-sensitive adhesive coated string, thread, orgroup of threads formed of natural or synthetic textile fibers orfilaments. The pressure-sensitive adhesive may beany of those known tothe art, and such'adhesives are described in detail in my earlier PatentNo.2,744,624.

While the preferred modification has been illustrated in Figure 2, it isalso considered within the scope of the present invention to apply theinsert strip parallel to the corrugation. In other Words, a narrow stripof double-' faced tape or the like may be applied to the tip of acorrugation and extended along such tip in the same direction as thelength direction of such corrugation. In such instance, insert stripsalong every other corrugation 'are'generallysufficient for theusualpackaging operation. 7

In operation, the modification of the present invention overcomes thepossibility of transfer of small bits of adhesive-coated paper toarticles removed from the pack aging device. Since the insert strip of.paper, film, string or the like, has greater internal strength than thematerial forming the corrugations, the corrugations will delaminatebefore said insert strip, and said insert strip acts as a barrierbetween the article packaged and any material which may delaminatefromthe corrugations. since such insert strip generally willcontact morethan one corrugation,-the force tending to cause delamination, i.e.

breaking of the adhesion between the article packaged of the materialused to Further,

aging device, tends to be distributed by such insert strip and as aresult is diminished as to any particular corrugation. Should the forcerequired to remove the packaged article be great enough to causedelamination of orieor more corrugations, the problem of removal of theadhesive-coated material from the article packaged is minimized sincethe bits of corrugated material will be on the opposite surface of theinsert strip from the article and the insert strip can readily be pulledfrom the article even if it should break entirely loose from thecorrugated board. While not illustrated herein, a. suitable liner asdescribed in Us. 2,744,624 would normally be applied to the finishedproduct of this invention pending use of the packaging device.

Obviously, many other modifications and variations of the invention ashereinbefore set forth may be made without departing from the spirit andscope thereof and therefore only such limitations should be imposed asare indicated in the appended claims.

I claim:

1. In a packaging device having a backing member with a plurality ofspaced, raised, compressible and resilient, pressure-sensitiveadhesive-coated areas, the improvement which comprises: an insert stripin contact with at least one of said pressure-sensitive adhesive-coatedareas, said insert strip having a coating of pressure-sensitive adhesiveon the surface thereof opposite the surface in contact with said areas.

2. A packaging device comprising: a backing member having a plurality ofspaced, raised, compressible and resilient areas; a strip of materialhaving high internal adhesion extending across and in contact with atleast one of said raised areas and adhesively secured thereto at theupper portion only of said raised area; and a pressuresensitive adhesivecoating on the surface of said strip opposite the side in contact withsaid raised area.

3. A packaging device comprising: a single face corrugated board havinga plurality of compressible, resilient corrugations extending across theface thereof; a plurality of strips of material having high internaladhesion, each adhesively held with its bottom surface in contact withat least one of said corrugations; and a pressuresensitive adhesivecoating on the top surfaces of said strips, said strips being spaced outof contact with each other.

4. A packaging device comprising: a single face corrugated board havinga plurality of compressible, resilient corrugations extending across theface thereof; and a plurality of narrow strips of double-facepressure-sensitive adhesive tape disposed on and in adhesive contactwith at least one of said corrugations, said strips being spaced apartfrom each other.

5. A device as in claim 4 wherein said strips extend at right anglestothe length direction of said corrugations.

=6. A device as in claim 4 wherein said strips extend parallel to thelength direction of said corrugations.

References Cited in the file of this patent UNITED STATES PATENTS2,001,798 Schreiber May 21, 1935 2,744,624 Hoogstoel et al May 8, 1956FOREIGN PATENTS 26,878 Great Britain 1913 140,152 Australia Feb. 5, 1951

